What kinds of inkstones can be divided into?

Inkstone is a familiar tool for grinding ink, and there are many kinds of inkstones. According to its texture, there are jade inkstone, pottery inkstone, pottery inkstone, lacquer inkstone, tile inkstone, gold, silver, copper, iron inkstone, porcelain inkstone and widely used inkstone. From the origin, there are more than 40 varieties of Duanzhou inkstone, Sheyan inkstone, Zhou Tao inkstone, Qingzhou inkstone, Wenzhou inkstone and Xinzhou inkstone. Among them, Shexian inkstone, Guangdong Duanyan, Gansu inkstone and Guo-made inkstone are the most famous, and they are known as the "four famous inkstones" in China. Its advantages are: the color is like Yun Lan, the sound is like a strange stone, it is as smooth as a wall jade, it is hard and durable, the ink quality is fine and durable, the cutting style is exquisite, and it has both use value and artistic value.